Riveting apparatus



May 2, 1933. A. HLAVA RIVETING APPARATUS Filed Jan. 18; 19:50

/LOIS HUM/A m, m INN R,L mA NL E V m f ing machine, during the period inwhich the Patented May 2, 1933..

UNITED STATES ALoIs HLAVA, or PILSEN, czEcHosLovAKIA, Assrernony ToLIMrTEn COMPANY FORMERLY sKoDA WORKS, PILsEN, orgrRAeUE; CZECHOSLOVAKIA,A CORPORA- TIoN or czEcnosLovAKnifl 5 j RIVTING APrABA'rUs Applicationmed January 1s, 1930,. seria'ifno. 421,621, and m czechsiovakiaJanuarylzs, 192s;

The present invention relates to an adjustable head for pin krivetingmachines. In riveting apparatus it is very important to intercept theoscillations and side movements of the object to be riveted, which ariseas a result of the pressure in the rivetends of the riveting pins aretransformed into rivet heads, in order that rthese movements should notbe transferred to the snap head die.

As the formation of the rivet head takes connection between the objectto be riveted and the pressure head of the rivetingmachine during theriveting operation.

This connection is kproduced by means of centering pins which are fixedin the adjust; able head in such a manner that they are pushed into thenearest rivet hole of the object to be riveted and thus this object issecured against any movement. These centering pins are especially usefulin riveting boilers, where it is necessary to work the boiler seams onthe boiler in three directions, namely, in the horizontal, vertical andoblique directions.

In the accompanying drawing an adjustable head according to the presentinvention is shown schematically.

Fig. 1 is a plan viewof the adjustable head with centering pins forhorizontal and vertical riveting. By turning `the head 1 about the axisof thefsnap head/die the apparatus is prepared for oblique riveting.

Fig. 2 is asectional elevation through they adjustable head showing onecentering pin for horizontal riveting. With the rivet head finished thecenteringpin is completely inserted in the rivet hole, kas is also thecase in vertical and oblique riveting.;` In Fig. 2, II shows (in dottedlines) the posi*- tion of the pin and the snap head die before theinsertion of the riveting pin and I the position of the pin and snaphead diel when the rivet head has been formed. j Y

The adjustable head 1 is revolubly mounted on the snap head die holder 2of the pressure head 3 of the riveting machine and is mm opaca;

secured thereon by means of screws 4..V kOnk the adjustable head lareformed two arms at right angles to each other, which are provided withgrooves forthe blocks 5 for vertical andh'orizontal riveting, in whichblocks the centering pins 6 are fixed in any known manner. y,These armsare provided with longitudinalgraduations and the blocks with anadjusting mark so that the centering pins the. riveting 0f oblique rivetseams ktakes place by means of a screw segment, with which a worm 8engages, the latter being mounted in a mounting 9 which is xed to thepressure head of the machine by means of screws 10. The'worm shaft has asquare portion on which a handle is fixed for turning the worm. Themounting of the worm is provided `with an angle scale so that theadjustable head can be accurately adjusted by means of the worm forriveting obliqueV seams.

I clalm 1. Riveting apparatus comprising a pres` sure head, a snap headdie, an adjustable head adapted to rotate about the axis of said snapyhead die and provided with a screw segment, a mounting attached to saidpressurek head, and a worm mounted on said mounting and engaging wlthsaid screw segment, the turning of said worm effecting the rotation ofsaid adjustable head.

2. Ina riveting'machine, the combination of a pressure head carrying adie holder, an

` adjustable head secured to said pressurev head andvrevoluble about thedie holder as a centre, said pressure head Vincluding an armrextendingat right angles to the axis Aof said die holder, and a centering pincarried Vby Ysaid arm and movable rectilinearly towards and away fromsaid die holder.

3. In a riveting machine, the combination of a pressure headcarrying adie holder, an

adjustable head secured to said pressure head and revoluble about thedie holder as a centre, said pressure head including a pair of arms atright angles to each other and to the axis of the die holder, and acentering pin carried by each arm and movable reetilinearly thereintowards and away from said die holder.

4. In a riveting machine, the Combination of a pressure head carrying adie holder, an

adjustable head comprising a hub rotatable about said die holder andarmsextending radially from said hub, means for se- Curing theadjustable head to the pressure head, a block slidable in each armtowards and away from said die holder, and a een tering pin carried bythe block. Y

5. In a riveting machine, the combination of a pressure head carrying adie holder, an adjustable head comprising a hub rotatable about said dieholders and arms extending radially Jfrom said hub at right angles toeach other, means for securing the adjustable head to the pressure head,means for rotating the adjustable head about said die holder as acentre, a block slidable in each arm towards and away from said dieholder, means for securing the blocks in adjusted position in the arms,and a centering pin carried by each block.

In testimony whereof I aIiX my signature.

ALOIS HLAVA.

